Thermostatic-switch unit



F. W. WOLF,

HERMOSTATIC SWITCH UNH'.

APPLxcATloN FILED Nov. 3, 191s.

1,366,759, Patented Jam 25, @EL

UNlrrosrares :umn w. .worn

F DETROIT, MICHIGAN,

PATENT oFFlcr..

ASSIGNQR, EY MESNE ASSIGNMENTS, TQ

THE 18x70 COIPANY, 0F CHICAGO, ILLINOIS, A COItl-QRATIO'N 0F DELAWARE.

THEBMOSTLTIC-SWITCH UNH?.

I[o all whom' it may concern."

Beit known that I, FRED W. WOLF, a citil zen of the .United States,.and resident of to a thermostatic switch struction.

Detroit, Wayne county, State of Michigan7 have invented certain new and useful linrovements in Thermostatic-Switch' Units,

of which the followingl is a specification.

This invention relates to thermostats and switches operated thereby, and particularly 'unit of novel con- .One of the objects of the invention is to 'provide a thermostatic switch unit particularly adapted for uSein an electrically operated refrigerator apparatus.

Another object of the invention is to provide a thermostatic switch unit adapted to permit the thermostat to depend into a refrigerated space with the switch located outside and preferably above said space.

Another object of the invention is to prol y vide a pivoted 'switch that may beso opervide a thermostat of U form,

`inside curve of ated by a thermostat that it will vfall into quick contact with the terminals.

Another object of the invenion is to provide a thermostat adapted to depend from a. support through an opening in' a refrigerator wall and have abundant clearance in said opening to insure its continued operation.

Another object of the invention is to proin which the accumulation of ice thereon.

Other' objects of the invention will apear from the following description taken with the drawing which forms a part hereof, and 'in which:

Figure 1 is an elevation of one form of thermostatic switch unit -built in accordance with this invention, with electrical con nections shown diagrammatically;

Fig. 2 is an elevation looking from the right of Fig. l; u

Fig. 3 is an enlarged sectional View on the line 3-3 of Fig. Il; and Figa 4 is a section on the line M of Fig. l.

Referring to the drawingsj 10 represents a base or support which may he of insu lating material, such as wood or liber, and ll isa 'dat bracket secured te and depend ing from the base. The lower end 'i2 of the bracket is turned at right angles to the cody thereof, and a thermostat har i3 is rigidly the U is rounded to prevent.

other.

Specicltion o! Letters Patent. Patented J @1L 25, 1921. .Application mee Ntvember 3, 191e. serial No. 129,350. y

' as by soldering.

A second thermostat bar 15.si1nilar in construction to the bar 13 is arranged parallel and adjacent thereto, and a rigid connecting piece 1G of U shape is arranged between the lower adjacent ends of the barsLThe ieee 1-6 is rrnly connected to the bars as hv the bolts 1T,

cross section or the U for the purpose of preventing the accumulation of ice or frost between the lower ends of the thermostat bars when the device is used in connection with a refrigerating apparatus.

Firrnly secured to the upper free ndof the 1oar 15 as by bolts 18 is a bracket 19 for operating the switch hereinafter described. This bracket is arranged parallel andadjacent to the bracket 1l and itwill be seen that the, cross section of these two brackets is-less than the largestppart of the thermostat sov that there will be ample clearance around them if the unit isinscrted through lan opening in a refrigerator or adapted to a hammer, and it is`:pivoted near its' lower and it is preferably formed y of agbar of metal of substantially round atleast rounded olf inside of the support l0' are.

end so that by its own weight it is adapted l with eitherwonle or the 20, 2L. it is shown to fall into contact other of the terminals in Fig. i in ull lines in contact with the t terminal E2G and in dotted lines with the terminal 2l.

The thermostat hereinabove described is connected 'to operate the switch and shift it from one of its contact positions te the A switch operating beitjd is arrangedherieontally in the upper'part of bracket lil as shown in Figs. 1 and 3. its, head 2'? may he made of' insulating mib terial and formed as ahook, as llhown in mation b'emen the pair of and usent lend Hom und 2;@

Thu t .wsta compls 2t; L pull' Uf paradisi thermos at bars, and 2L ng piece be'tweQn :xdif said 031 and having a. roundcoseu :salamoia taci; position "1; L "1 sol@ ram scope of invention.

-Ting a parb sub .t bars vcfti ,nUy md. Connecting piece bf bars and hav- "ostat con 1 sng a pair of sub" and a rgw U Smpd connecting Y "une @oww ends pf @lid bars wil@ i, S U.

mufds. 

